--- /dev/null
+/*
+ * cs5345 Cirrus Logic 24-bit, 192 kHz Stereo Audio ADC
+ * Copyright (C) 2007 Hans Verkuil
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <linux/slab.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ctrls.h>
+
+MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC");
+MODULE_AUTHOR("Hans Verkuil");
+MODULE_LICENSE("GPL");
+
+static bool debug;
+
+module_param(debug, bool, 0644);
+
+MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
+
+struct cs5345_state {
+ struct v4l2_subdev sd;
+ struct v4l2_ctrl_handler hdl;
+};
+
+static inline struct cs5345_state *to_state(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct cs5345_state, sd);
+}
+
+static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
+{
+ return &container_of(ctrl->handler, struct cs5345_state, hdl)->sd;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+ return i2c_smbus_write_byte_data(client, reg, value);
+}
+
+static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+ return i2c_smbus_read_byte_data(client, reg);
+}
+
+static int cs5345_s_routing(struct v4l2_subdev *sd,
+ u32 input, u32 output, u32 config)
+{
+ if ((input & 0xf) > 6) {
+ v4l2_err(sd, "Invalid input %d.\n", input);
+ return -EINVAL;
+ }
+ cs5345_write(sd, 0x09, input & 0xf);
+ cs5345_write(sd, 0x05, input & 0xf0);
+ return 0;
+}
+
+static int cs5345_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct v4l2_subdev *sd = to_sd(ctrl);
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ cs5345_write(sd, 0x04, ctrl->val ? 0x80 : 0);
+ return 0;
+ case V4L2_CID_AUDIO_VOLUME:
+ cs5345_write(sd, 0x07, ((u8)ctrl->val) & 0x3f);
+ cs5345_write(sd, 0x08, ((u8)ctrl->val) & 0x3f);
+ return 0;
+ }
+ return -EINVAL;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
+{
+ reg->size = 1;
+ reg->val = cs5345_read(sd, reg->reg & 0x1f);
+ return 0;
+}
+
+static int cs5345_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)
+{
+ cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff);
+ return 0;
+}
+#endif
+
+static int cs5345_log_status(struct v4l2_subdev *sd)
+{
+ u8 v = cs5345_read(sd, 0x09) & 7;
+ u8 m = cs5345_read(sd, 0x04);
+ int vol = cs5345_read(sd, 0x08) & 0x3f;
+
+ v4l2_info(sd, "Input: %d%s\n", v,
+ (m & 0x80) ? " (muted)" : "");
+ if (vol >= 32)
+ vol = vol - 64;
+ v4l2_info(sd, "Volume: %d dB\n", vol);
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct v4l2_ctrl_ops cs5345_ctrl_ops = {
+ .s_ctrl = cs5345_s_ctrl,
+};
+
+static const struct v4l2_subdev_core_ops cs5345_core_ops = {
+ .log_status = cs5345_log_status,
+ .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
+ .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
+ .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
+ .g_ctrl = v4l2_subdev_g_ctrl,
+ .s_ctrl = v4l2_subdev_s_ctrl,
+ .queryctrl = v4l2_subdev_queryctrl,
+ .querymenu = v4l2_subdev_querymenu,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ .g_register = cs5345_g_register,
+ .s_register = cs5345_s_register,
+#endif
+};
+
+static const struct v4l2_subdev_audio_ops cs5345_audio_ops = {
+ .s_routing = cs5345_s_routing,
+};
+
+static const struct v4l2_subdev_ops cs5345_ops = {
+ .core = &cs5345_core_ops,
+ .audio = &cs5345_audio_ops,
+};
+
+/* ----------------------------------------------------------------------- */
+
+static int cs5345_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct cs5345_state *state;
+ struct v4l2_subdev *sd;
+
+ /* Check if the adapter supports the needed features */
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -EIO;
+
+ v4l_info(client, "chip found @ 0x%x (%s)\n",
+ client->addr << 1, client->adapter->name);
+
+ state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
+ if (state == NULL)
+ return -ENOMEM;
+ sd = &state->sd;
+ v4l2_i2c_subdev_init(sd, client, &cs5345_ops);
+
+ v4l2_ctrl_handler_init(&state->hdl, 2);
+ v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops,
+ V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
+ v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops,
+ V4L2_CID_AUDIO_VOLUME, -24, 24, 1, 0);
+ sd->ctrl_handler = &state->hdl;
+ if (state->hdl.error) {
+ int err = state->hdl.error;
+
+ v4l2_ctrl_handler_free(&state->hdl);
+ return err;
+ }
+ /* set volume/mute */
+ v4l2_ctrl_handler_setup(&state->hdl);
+
+ cs5345_write(sd, 0x02, 0x00);
+ cs5345_write(sd, 0x04, 0x01);
+ cs5345_write(sd, 0x09, 0x01);
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static int cs5345_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct cs5345_state *state = to_state(sd);
+
+ v4l2_device_unregister_subdev(sd);
+ v4l2_ctrl_handler_free(&state->hdl);
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct i2c_device_id cs5345_id[] = {
+ { "cs5345", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, cs5345_id);
+
+static struct i2c_driver cs5345_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "cs5345",
+ },
+ .probe = cs5345_probe,
+ .remove = cs5345_remove,
+ .id_table = cs5345_id,
+};
+
+module_i2c_driver(cs5345_driver);
Code Review / kvmfornfv.git / blobdiff